Peter Kellner
@pkellner
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Software Developer, Architect, Pluralsight Author, React, .net and forever Learner. https://t.co/nQkNf5PUdz
Pre: 37.3034548,-121.95834
Joined September 2007
"What is React" course released at @Pluralsight Learn the basic architecture of React, what a React app looks like and what makes React awesome @reactjs
pluralsight.com
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Tired of opening SonicWall Admin to see if one of my ISPs is down so threw this together to run inside my network. Open source it? Anybody but me care about Shi. Like this?
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Love this!
I'm so excited about literally everything right now. 2026 is going to be so much fun.
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Todays AI lesson: if @AnthropicAI or @OpenAI with @ClaudeCode or @cursor_ai is having trouble converging on a working solution ask it: “You seem to be having trouble, is there some reason or architecture issue causing that” and surprisingly, there might be (in my case there was)
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I find that with @AnthropicAI Claude Code that it's important that it understand how it screwed up so it just doesn't do it again.
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This is summarizes, my thinking almost exactly regarding coding in AI. Surprised any real production app were mistakes or costly. https://t.co/2VgyCoiBWw
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Hey @leerob I ran out of my $200 allotment on @cursor_ai so started back up my @claudeai (Claude Code) to 2x my dollars. With small exceptions, I’m liking it better with the VS Code Beta Extension so will downgrade Cursor. Happy to chat, but I get these things change fast.
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When AI Coding, do you always let AI Prompt you, or just let loose?
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I’m not quite done yet, but here is what my morning has cost so far. Not free, but considering the value, worth it. This was a hard problem and will result in some really good unit tests to make our app much better.
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With @cursor_ai, and @OpenAI ’s “GPT-5.1 Code High”, for the first time feel like I’m talking to an intelligent senior engineer about solving a difficult problem. Unfortunately, the learnings will not carry forward and next time, I’ll have to spend the same 2 hours again.
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Such an easy fix, for such a big performance gain. Thank you.
Random UUIDs are killing your database performance You switched from integer IDs (1, 2, 3…) to UUIDs (a1b2-3c4d-…) for security or distributed generation. Then your database writes get slower, sometimes much slower. Here’s why: Index Fragmentation. Most database indexes
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I live in a scary desert where there are rattlesnakes up early in the morning in the dark. I have a button on my iPhone that depends on a @Cloudflare service to turn my outdoor lights on before venturing to my garage office. Whoops.
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Don’t miss! Great @reactjs content.
⚠️ In 90 Minutes Learn how Suspense, transitions, and optimistic updates work in React with core team member @rickhanlonii. Details:
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Feeling the need to share that the @cursor_ai Compose1 model seems to have gotten much better than when first released. @chatGPT5 has been really slow lately for me so I switched to Composer1 and it’s pretty amazing. OK, back to regularly scheduled programming.
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So so many people don’t realize this. It’s really important to understand.
@roguesherlock React has “use client” and “use server”. The others are specific to one framework.
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@roguesherlock React has “use client” and “use server”. The others are specific to one framework.
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What a great endorsement by one of the industry legends of @tannerlinsley and @tan_stack
I've been using @tan_stack Start for a new project and it's super good. The server functions completely replace the need for TRPC/GraphQL/REST, the middleware is composable and fully typed, and having TSRouter's nice typing and stateful search params is icing on the cake. A+!
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I love the “thundering herd” label to computer problems. OK, back to regularly scheduled programming.
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